Compressed-air pump.



fairey Sterns RALPH W. ELLIOTT, OF OAKLEY, CALIFORNIA, ASSIGNOR OFONE-HALF TO FRANK P. BAKER, OF SAME PLACE.

COMPRESSED-AIR PUNlP.

SPECIFICATION forming part of Letters Patent No. 671,209, dated April 2,1901.

Application iled December 17. 1900l Serial No. 40,183. tNo model.)

To all whom t may concern.- upon the surface of the water will force theBe it known that I, RALPH W. ELLIOTT, a water upward through the pipe 3and will concitizen of the United States, residing at Oak. tinue to doso so long as the compressed air ley, in the county of Contra Costa andState is admitted and the level of the water in said 5 of California,have invented certain new and cylinder is above the open lower end ofsaid 55 useful Improvements in Compressed Air pipe 3. Pumps, of whichthe following is a speciica- 8 is an auxiliary pipe or conduit forutiltion. izing a portion of the compressed air in the My inventionrelates to improvements in' cylinder after the water has been forced outlo compressed-air pumps, theobjectofmyinven- .therefrom to shut off thefurther supply of 6o tion being to provide a device by means of'compressed air and maintain it so shut olf which compressed air may beutilized to pump while the water is refilling the cylinder and water orother liquids and which will operate also to insure the escape of thecompressed with as little friction as possible and require air from thecylinder. In said pipe 8 are two z5 no lubrication. valves 9 10,actuated by floats l1 12 at the 65 My invention therefore resides in thenovel lower end of rods 13 14, attached at their up construction,combination, and arrangement per ends to levers 15 16, pivoted onbrackets of parts for the above ends hereinafter fully 17 18, mounted onthe valve-casings. The specied, and particularly pointed out in thefloat 11 rises and falls near the bottom of the zo claim. cylinder,being supported by the long rod 13, 7o

In the accompanying drawings, Figure 1 is sliding in the tube 19 withinthe cylinder and a side elevation of my improved pump, the in the guide2O on the top of the cylinder, cylinder-casing being broken away to showwhile the float 12 rises and fallsnear the top the interior. Fig. 2 is aside elevation of the of the cylinder, being supported bythe short topof the pump from a different point ofview rod 14, sliding in the guide21 on the top of -75 to that of Fig. 1. Fig. 3 is a plan view of the thecylinder. The lever 15 is a lever of the top of the cylinder, and Figs.4, 5, and 6 are first order, while the lever 16 is a lever of thedetails of the valves. second order, and thus while the fall of theReferring to the drawings, 1 represents the iioat 11 opens the valve`9the fall of the lioat 3o cylinder into which the water to be raised by12 closes the valve 10. When now the level 8o means of the compressedair is first introof the water in the cylinderfalls below the duced,said water being admitted into said lioat 11 and said iioat falls, theyalve 9 is cylinder by means of a check-valve in the thereby opened anda portion of theV coinbottom of the cylinder, 3 representing the pressedair in the cylinder escapes along the pipe leading upward from a pointnear the pipe 8 through the valve 9. The valve 10 85 bottom of thecylinder, through which pipe was closed by the fall of the float 12, andthus the water is forced by the compressed air and the compressed airadmitted into said pipe 8 delivered to a distant point. In the lower endlinds no outlet therefrom, and when it enters of said pipe 3 is acheck-valve 4, which holds a chamber 23, connected to said pipe 8 and 4oup the water which has already been forced having a flexible diaphragm24,- it inflates 9o along said pipe 3 and prevents its return saiddiaphragm, thereby raising the head 25 when the compressed air iswithdrawn from of the valve-stem 26 in a valve 27in the horithe cylinderto refill it with a fresh body of zontal member 6 of thecompressed-air-supwater. ply pipe. When said valve-stem 26 is so Thecompressed air is conveyed to the cylraised, it cuts off the supply ofcompressed 95 inder by a pipe 5, connected by a horizontal air to thecylinder, but permits compressed member 6 with a vertical pipe 7,erected upon air to flow back from the cylinder through the top of thecylinder, through which pipe 7 small apertures 28 in the casing of saidvalve. it is admitted directly into the cylinder. The In passing intothe chamber 23 the comf 5o pressure of the compressed air so admittedpressed air passes through a check-valve 29 roo in the pipe 8, whichpermits its forward movement, but prevents return movement. Thecompressed air is therefore completely trapped between the valve 29 andthe valve 10 and maintains the valve 26 in its raised position, therebyinsuring the escape of the compressed air through the apertures 28 untilthe level of the water rises to the float 12. As the compressed airescapes from the cylinder it is displaced by water admitted through thecheck-valve 2 and the level of the water begins to rise. A small rise insaid level closes the valve 9, and when the water comes to the top ofthe cylinder it actuat-es the oat l2 to open the valve l0, therebypermitting the air which was confined between the two valves l and 29 toescape through the upturned end 3l of the pipe 8, so that the diaphragm24 collapses and the valve-stem 26 drops, thereby reopening the cylinderl to the entrance of the compressed air through the pipes 5 6 7. Thecompressed air thus admitted now proceeds to do its work in elevatingthe water in the cylinder through the pipe 3 to a distant point, itbeing remarked that as soon as the level of the water has fallen a shortdistance the valve is again closed, in which position it is required tobe for the next operation of inflating the diaphragm 24 to actuate thevalve-,stem 26, and by reason of the Valve 9 having been closed andremaining so closed until the water falls to the bottom Vof the cylinderthe compressed air cannot I claim- In a compressed-air pump, thecombination of a liquid-receptacle, a check-valve for admitting liquidthereto, a pipe for conducting liquid from said vessel, said pipeopening near the bottom thereof, a compressed-air induction-pipe leadingto said vessel and opening thereinto at the upper end thereof, anauxiliary compressed-air conduit supported on the top of, and whollyoutside, the liquid-receptacle, said auxiliary conduit dischargingdirectly into the surrounding medium outside the liquid-receptacle, avalve in said auxiliary conduit preventing such discharge, a iioat inthe upper portion of the receptacle, connected through the top thereofwith said valve to operate the same to release the compressed air, avalvein said auxiliarycond uit for admitting air thereinto from theliquid-receptacle, a ioat in the lower portion of the receptacle,connected through the top thereof with the latter valve to operate thesame to admit said air thereinto, a valve in the inductionpipe forcontrolling the passage of the compressed air therealong, a chamberconnected with the auxiliary conduit, and a flexible diaphragm forming awall of said chamber and operating said valve, substantially asdescribed.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses. y

R. W. ELLIOTT. Witnesses:

FRANCIS M. WRIGHT, Z. A. DANIELs.

